Question

Question 1 What is fermentation?
Question 2 Who discovered the antibiotics?
Question 3Who discovered the vaccine for small pox?
Question 4How do pathogens enter in our body?
Question 5What are preservatives?
Question 6Which micro-organism is called as the nitrogen fixing
bacteria?​

Answer 1

Answers:

1) The chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.

2)  Selman Waksman

3)  Edward Jenner in 1796

4) Micro-organisms, like pathogens,  usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier. Organisms can spread, or be transmitted, by several routes.

5) A preservative is a substance or a chemical that is added to products such as food products, beverages, pharmaceutical drugs, paints, biological samples, cosmetics, wood, and many other products to prevent decomposition by microbial growth or by undesirable chemical changes.

6) Azotobacter

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